So you think you can get 10W out of a simple 5V circuit in 4 ohms if you are prepared to 'forget' the theoretical stuff? Just trying to find out what your point is.
BTW Are you going to apologize for trying to use my perceived nationality to discredit me?
Jan
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Wow,wow,Jan it’s was a practical joke of the nethlands we sad -humor- ,I can you All many years,looked at pm.
Then I said not 10 watt,I said 0.5 watt and then 640 ,ten years ago I make with the 540 with the 240 with 12 accu ,just good reading.
Mvg wol
Then I said not 10 watt,I said 0.5 watt and then 640 ,ten years ago I make with the 540 with the 240 with 12 accu ,just good reading.
Mvg wol
Sooner the better. The World would be Less chaotic as minimalist master himself has said.
Regards.
I'M GETTING 10w IN MY EARS, OTHERS ARE GETTING HALF WATT IN OSCILLOSCOPE
WHAT'S THE FUSS?
May be they listen through oacilloscope !!
Or supply one as freebie to customers with products so to check value for money round the clock?!
WHAT'S THE FUSS?
May be they listen through oacilloscope !!
Or supply one as freebie to customers with products so to check value for money round the clock?!
we need standardized measurements so that everyone can understand in the same perception, because our ear are not calibrated
Unlike yours, our ears are not able to survive exposure to 10W of acoustic power, nor can they hear electric power. We have to defer using our meters to do so.
Scotoma - word to describe 'we see what we want to see' in philosophy,you'll find the reference in the movie 'the da vinci code',
same for listening, about seeing, I 'saw' this double mars day, as perfect for all wars, mars, the war lord
But with Sun and Jupiter's blessing, the malefic mars backtracks a bit, only for the blessed ones, who found some bit of substance in my extravaganza.
About seeing,
Proof is here too, someone's location is BE, but as he says, not the BEwe all know )
To see the unseen, to hear the inaudible, demands not just mastery, but bleasing too, blessing is the reason for this season, would be endless queues after just two weeks mmm.
same for listening, about seeing, I 'saw' this double mars day, as perfect for all wars, mars, the war lord
But with Sun and Jupiter's blessing, the malefic mars backtracks a bit, only for the blessed ones, who found some bit of substance in my extravaganza.
About seeing,
Proof is here too, someone's location is BE, but as he says, not the BEwe all know )
To see the unseen, to hear the inaudible, demands not just mastery, but bleasing too, blessing is the reason for this season, would be endless queues after just two weeks mmm.
You just did!
The way you mentioned, seems, you hear the word very often, @10w 😀:
Technical part is, imo, already overIndr- could we keep the discussion more "technical" ? 😀
I always stuck to my point, because I'm all hands on person, though later gibberish from others with apparent vested interests and dogmatic tone over impractical things on long run, only made this helpful post get lengthier, and problematic to newcomers to follow properlyYour first post that actually makes sense.
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You appear to mean the PE 1956 scheme. You seem to have missed the small print: the speaker is 45 Ohms.
A hasty analysis suggests almost 6V peak-peak or say 2Vrms or 0.088 Watts out. For maybe 0.4 Watts of battery power. 22% efficiency; 25% is the ideal answer when DC is allowed in the load (it usually isn't).
Fretting details: while hi-fi speakers are 95% dead resistance, a "loud" horn has significant acoustic resistance. It may really be 30 Ohms DC and 35-100 Ohms in its (narrow) working range. I started working that out, but it makes little difference.
All-in-all, I bet that was a very lame "megaphone". The acoustic output is not more than a normal voice (much less than the pubic talkers of the pre-PA days), and the directivity little better. It is more like "Oh, WOW! Transistor!!" than a useful speaking aid.
For today's 5V 4 Ohm plan, I get as much as 0.79 Watts out, *if* the MOSFET gate voltage "happens to be right" for an ideal operating point. Whether this could "sound like" 10 Watts is of course a matter of perception. A part-Watt can be impressive, especially for so little parts.
The full article has you fiddling R1 value and also MIC bias 1.5 3 6V, to get "best over-all results". This covers the wide variability of 1956's low-price transistors, and speaker and mike element DC resistance.
I did not know a simulator drawing was mandatory?
+1
Match-book (or cigarette-paper) and slide-rule are helpful also.
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